Why enlightenment?

If you'd prefer using Qt or GTK, both have dedicated distros.
For instance, hackable:1 is the continuation of the initial OpenMoko software
stack that was based on GTK.
As to why openmoko guys decided one day to sacrifice all the work already done
with GTK and to go for a plain new framework, well you should as well ask
"Why those Moai on the Easter island" ? :-)